package com.cet.qz.unit01.chapter1_2;

/**
 * @program: algorithm
 * @description:
 * @author: 陈恩涛
 * @create: 2021-03-02 21:12
 **/
public class Qz1_2_5 {
    public static void main(String[] args) {
        String s = "Hello World";
        s.toUpperCase();
        s.substring(6,11);
        System.out.println(s);
    }
}
